Electro-mechanical gong



(No Model.)

2 SheetsSheet 1. G. DOYLE. ELEGTRO MECHANICAL GONG.

No. 486,560. Patented Sept. 16, 1890.

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N0 Model.) G DOYLE 2 Sheets-Sheet 2.

ELECTRO MECHANICAL GONG.

Patented Sept. 16, 1890.

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UNITED STATES PATENT OFFICE.

GEORGE DOYLE, OF VVATERTOWVN, MASSACHUSETTS.

ELECTRO-MECHANICAL GONG.

SPECIFICATION forming part of Letters Patent No. 436,560, datedSeptember 16, 1890.

Application filed April 22,1889. Serial No. 308,074. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE DOYLE, of Waterfown, in the county ofMiddlesex and State of Massachusetts, have invented a new and usefulImprovement in Electro-Mechanical Gongs and the Like, of which thefollowing is a specification, reference being had to the accompanyingdrawings, in which- Figure 1 is a front, and Fig. 2 a side view, of agong embodying my invention. Fig. 3 is a detail view of the double armhereinafter referred to. Fig. 4 is a detail view of a portion of thearmature-arm, showing the lugs with which the lug shown on the doublearm engages. Fig. 5 shows the spring-bolt and rebounding springhereinafter explained.

My invention consists in the combination of abell-hammer and clockworkto actuate it by means of a spring connecting the bell-hammer and pitmancontrolled by the clock-work. Hitherto the bell-hammers have beenconnected rigidly to the pitman, and the consequence has been that thehammer has been retracted with practically the same force that wasexpended in causing it to strike the bell. This has resulted in avibration of the hammer at the end of its return-stroke and frequentconsequent false blows on the bell. The object of my invention is toprevent the false blows.

In the drawings, the pitman 1, instead of being rigidly attached to thebell-hammer 2, as heretofore, is connected to the bell-hammer by aspring 3, one end of the spring being secured to the bell-hammer at xand the other end to a block y, into which. the body-screwZ through theend of the pitman sets. (See Fig. 1.)

I provide a locking device to secure the pitman and bell-hammer togetherat the end of the back-stroke of the hammer, and this device isconveniently made up of the lug 5 on the pitman and a bolt 6 on thebell-hammer, the bolt 6 being backed up by a spring a".

Starting with the parts in the positions shown in Fig. 1, the operationis as follows: A current through the coil a attracts the armature 7 andmoves its arm a so that the lug 8 on the double arm 4. is moved out ofen: gagement with the lug 9 on the armature-arm and into engagement withthe lug 10 on the armature-arm, the double arm 4 being rigidly mountedon the journal 11, which is provided with a gear 12. This gear 12 mesheswith gear 17, mounted on a journal 16, provided with a gear 15, whichmeshes with gear 14, which is actuated directly by the mainspring 13.When the armature-arm is moved, as above explained, the double arm isnecessarily moved to separate lugs 8 and 9, and when the armature movesback thelug 10 is carried out of the path of thelug 8, and the doublearm 4 and its journal 11 are now free to rotate. Rotation of the journal11 moves the joint a by which the inner ends of the double arm 4 andpitman 1 are connected, in a circular path, and the lug 5 on pitman 1 iscarried past the end of the bolt 6. As the joint 01. completes, say,itsone hundred and eightieth degree of rotation, the hammer strikes thebell, and as the joint a moves to the position shown in Fig. 1 thespring 3 is put under tension, and this tension of the spring 3 returnsthe hammer more leisurely to its position of rest (see full lines inFig. 1) than is the case when the pit-' man and hammer are rigidlyconnected. As the hammer returns to its position of rest, the beveledend of the bolt 6 strikes against and rides over its lug 5, the bolt 6being pushed back against the force of its spring a, and as the boltslips past the lug 5 the spring a pushes the bolt 6 past the lug 5, asshown in Fig. 1, and no vibration of the hammer sufficient to permit thestriking of a false blow is possible.

WVhat I claim is- 1. In an electro-mechanical gong, the combination,with an armature, an arm carried thereby, and alever mounted on a shaftwhich forms part of the motor, of a pitman, a spring, and a pivotedhammer, the lever and pitman being loosely jointed together, the freeend of the lever and the arm of the armature being alternately engagedand disengaged, and the pitman and pivoted hammer being connected by thespring, substantially as and for the purpose set forth.

' 2. In an electro-mechanical gong, the combination of the pit'man andpivoted hammer with a spring and locking device, the spring connectingthe pitman and hammer and returning the hammer to its position of restand the locking device locking the hammer in its position of rest whenthe hammer is returned by its spring, substantially as and for thepurpose set forth.

GEORGE DOYLE.

Witnesses:

EDWARD S. BEACH, JOHN R. SNOW.

